reducing the size of a pdf

I am looking for a free tool or way to reduce the size of a large number of pdf files on our servers.  I do not have adobe acrobat and I can not use an online too so I need to be able to download it.

thank you
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HalCHubAsked:
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Joe Winograd, Fellow&MVEDeveloperCommented:
For a downloadable (not online), free tool that can operate on a large number of PDF files, this Google Code project command line tool called pdfsizeopt is worth a try:
https://code.google.com/p/pdfsizeopt/

I've used it on many PDFs, most resulting in significant size reductions. But it had problems with a few files, so you'll need to test it on your particular PDFs.

These are the installation instructions that worked for me on W7 Pro 64-bit:
https://code.google.com/p/pdfsizeopt/wiki/InstallationInstructionWindows

Initially, I did not have Multivalent.jar, so when I ran pdfsizeopt, I received this error message:

AssertionError: Multivalent.jar not found, see above

However, it still created the optimized output file. Then I downloaded Multivalent.jar from SourceForge:
http://sourceforge.net/projects/multivalent/files/

I put it in the same folder as pdfsizeopt.exe, and it seems to have run, but I received this error message:

AssertionError: Multivalent failed (status)

I did not attempt to troubleshoot the Multivalent failure any further, since pdfsizeopt still created the optimized output file. Regards, Joe
HalCHubAuthor Commented:
does not work for me
Joe Winograd, Fellow&MVEDeveloperCommented:
> does not work for me

Please provide more info. In what way doesn't it work? Installation fails? Error when running? AppCrash? Fails to create new PDF file? Pages missing from PDF file that it creates? Doesn't reduce the size? You get the idea — I need to know more in order to try to help you. And what OS, including bit-level, are you trying to run it on?
Dave BaldwinFixer of ProblemsCommented:
A couple of times people have sent me PDFs that were larger than they needed to be.  What I did was open them in Adobe Reader and then print them to PDF thru the CutePDF printer driver.  http://www.cutepdf.com/  Did a good job.
Joe Winograd, Fellow&MVEDeveloperCommented:
Hi Dave,
Same experience here — sometimes printing to a PDF print driver reduces the size (depends on why the PDF is so big). CutePDF Writer is definitely a good one, and seven other free good ones (with varying features) are Bullzip, doPDF, Foxit Reader PDF (part of the Foxit Reader install), Nitro PDF Creator (part of the Nitro Reader install), PDFCreator, PDF-XChange Printer (part of the PDF-XChange Editor install), PrimoPDF. But the issue in this case is that he wants to do it on "a large number of pdf files on our servers". So manually loading each file in Adobe Reader and printing it to a print driver is not going to do the trick — he needs a batch/command line approach or some form of automation to deal with a large number of files. It may be possible to use a script (AutoHotkey, AutoIT, VBScript, etc.) in conjunction with one of the print drivers, but I'm not hopeful — a send-keystrokes approach would probably be iffy in this case. The most difficult part of his question is "free". :)  Regards, Joe

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